Sash-lock.



UNITED STATES Patented September 15, 1903.

PATENT OFFICE.

SASH-LOCK.

SPECIFICATION formingpart of Letters Patent No. 739,109, dated September15, 1903.

Application filed January 25, 1902. Serial No- 9L215. (N0 model.)

To all whom it may concern.-

Be it known that I, JOHN Ross, a citizen of the United States, residingat VVessington, in the county of Beadle and State of South Dakota, haveinvented certain new and useful Improvements in Sash-Locks, of which theinvention consists in the novel construction,

and combination of parts hereinafter more fully described and claimed,and illustrated in the accompanying drawings, showing the preferred formof my invention, and in which Figure 1 is an elevation showing a sashlocked in lowered position by my improved lock. Fig. 2 is a similar viewshowing the sash held in raised position thereby, and Fig. 3 is a detailView of the lock detached.

Referring to the figures by numerals of reference, 1 is a window-casing,to the inner sur:

face of each side of which is secured a rack 2, the teeth thereof havingtheir upper edges horizontal. Each rack terminates at a point removedfrom the sill 3 and forms an angular shoulder adapted to be engaged bythe look when the sash is in its lowest position.-

Secured to eachside of the sash 4 is a lock formed in a single piece ofspring metal. This lock comprises a plate 5; a spring-arm 6, integraltherewith and extending therefrom; a head 7, and a lift 8, adjacent tothe head. The plate 5 is provided with a desired number of apertures 9for the reception of fastening means whereby the lock may be secured tothe sash. This plate is secured in such a position as to hold the head 7normally pressed the lifts.

racks until arms 6 contact with stops 10, ar-

ranged upon the sash. The sash can then be raised by continuing to pressupward upon The upper and lower working faces of the heads 7 are soshaped that one can engage the lower end of the rack and prevent upwardmovement and the other can engage the horizontal face of any one of theteeth of the rack and prevent downward movement. The end of each head isbeveled, as shown at 11, whereby when said head has been disengaged fromthe end of the rack it can easily slip upward over the teeth and whenpressed downward will fit snugly upon a tooth and prevent movement.

It will be seen that the device is simple and effective, can be readilyplaced in position upon a window, and serves the purposes of a lock,lift, and balance.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am aware thatmodifications may be made therein without departing from the spirit orsacrificing the advantages thereof, and I therefore reserve the righttomake such changes as fairly fall Within the scope of my invention.

Having thus fully described my invention, what I therefore claim as new,and desire to secure by Letters Patent, is-

In a sash-lock, the combination witha window-frame having a rack-barsecured thereto, of a curved'spring-arm having its upper end secured tothe lower sash of said frame, the lower end of the arm being providedwith a catch and a curved finger arranged on opposite sides thereof, theupper surface of the catch being adapted to springably engage theterminal lower end of the rack-bar to'lock the sash against upwardmovement, the catch also having a spring movement upwardly over theteeth of the rack-bar so that the i In testimony whereof I afiix mysignature under surface of the same will engage any in presence of twowitnesses.

one of the teeth thereby to hold the sash in a raised position, thecurved finger serving JOHN ROSS 5 to operate the catch, and a stop forregulat- \Vitnesses:

ing the movement of said spring-arm, sub- H. A. PEIRCE,

E. D. SCHOLLIAN.

sta-ntially as specified.

